Add example for transition

Author: smessmer

examples/animation/animated_fox.rs

@@ -1,6 +1,7 @@
 //! Plays animations from a skinned glTF.
 
 use std::f32::consts::PI;
+use std::time::Duration;
 
 use bevy::prelude::*;
 
@@ -122,7 +123,10 @@ fn keyboard_animation_control(
         if keyboard_input.just_pressed(KeyCode::Return) {
             *current_animation = (*current_animation + 1) % animations.0.len();
             player
-                .play(animations.0[*current_animation].clone_weak(), None)
+                .play(
+                    animations.0[*current_animation].clone_weak(),
+                    Some(Duration::from_millis(250)),
+                )
                 .repeat();
         }
     }